Application of smart LED street lights in urban road lighting - Alite

Smart street lights are an important part of smart cities. It uses urban sensors, power line carrier/ZIGBEE communication technology and wireless GPRS/CDMA communication technology to connect street lights in the city in series to form the Internet of Things and realize remote centralized control and management of street lights. Condition setting scheme, automatic brightness adjustment, remote lighting control, fault active alarm, light cable anti-theft, remote meter reading and other functions. Various social security incidents, save energy consumption of urban public lighting, create a low-carbon environment-friendly city, and build a livable area. As the basic link of urban construction, smart street lights play a very important role in ensuring people's normal life. The design and application of the intelligent street lamp control system can effectively save the resources and energy consumed by the operation of the traditional street lamp system, improve the operating efficiency of the intelligent street lamp system, realize the remote control of the street lamp, liberate manpower, reduce labor costs, further promote the convenience of people's life, and improve the urban environment. 

1.Energy Consumption

The annual power consumption of traditional lighting street lamps is 5005.6 billion kW h, while smart street lamps can save 100 billion kW h of electricity every year. Therefore, in the development of modern cities, the extensive use of smart street lights will significantly reduce the energy consumption of urban public facilities, improve the efficiency of urban energy utilization, and further promote the long-term and sustainable development of cities.

2.Economic benefits

Assume that the city lighting is from 6:00 to 8:00 pm and from 10:00 to 12:00 pm, and a single light is on for 12 hours. Then compared with 250W high-pressure sodium lamps, the urban intelligent lighting system can reduce power consumption by 70%, and will reduce power consumption by 30% between 12 am and 6 am.

Under the above usage conditions, each lamp of the intelligent road lighting system will save 800 yuan in use costs every year, which greatly reduces the cost of urban lighting.

3.aspects of control technology

The urban smart street lighting system uses GPRS+ZigBee and GPRS+ power line carrier communication for remote communication control. Generally speaking, GPRS is responsible for long-distance transmission and control, while ZigBee and power line carrier technology are responsible for short-distance networking. Through the integration of the above several technologies, the advantages of each technology can be effectively played, and the disadvantages of various technologies can be complemented, so as to effectively complete the functions of data collection, data storage and data transmission.

4 About lifespan

The service life of LED light sources is very long, generally between 50,000 and 80,000 h. However, in actual use, there are many factors that affect the life of the LED light source. It is inevitably affected by factors such as temperature changes and ultraviolet radiation during use, and the life of the supporting capacitor is relatively short, often not exceeding 10,000 h. During the working process of LEDs, not all electrical energy can be converted into light, but part of it is converted into heat energy. Keeping high temperature for a long time will affect its own life, and it is easy to burn due to overheating. The average lifespan of the high-pressure sodium lamps used in the past is less than 30,000 h, and the lifespan of the ballast is often longer than the lifespan of the lamp itself.

Application prospects of smart LED street lights in urban road lighting

The future road lighting control technology will integrate new technologies such as electronics, control, and communication with the concept of smart cities and the Internet of things to provide higher-quality public services. At present, the road lighting system has benefited from the continuous progress of intelligent technology, has broken through the shackles of past development, and continues to develop in the direction of standardization, networking and intelligence.

1 Intelligent

Lighting control technology has experienced many technical iterations in the past, from the earliest mechanical switch control to the current automation control. However, the current development of smart cities has put forward higher requirements for lighting control technology, which needs to be able to combine various types of more advanced electronic information and remote communication technologies to achieve intelligent control effects. Moreover, with the further advancement of urban construction, street lamps, a traditional lighting facility, are also required to integrate more functional features. This requires that the control system used needs to have sufficient scalability, be able to integrate more functional modules, and realize more demands. At present, domestic cities such as Beijing, Shanghai, Guangzhou and Shenzhen have begun pilot projects of intelligent road control systems. By upgrading the software and hardware of the system, the frequency conversion, dimming and power control of street lighting can be realized, and the surrounding environmental information can also be collected extensively, so as to achieve more accurate automatic control, and can also achieve good working status monitoring And the fault feedback effect makes urban lighting more stable and intelligent.

2. Normalization

A modern lighting system integrates multiple devices and therefore cannot be supplied by a single supplier. However, the compatibility of each manufacturer is different, and the actual use will be affected. Therefore, standardized production is a necessary trend for smart LED street lights in urban road lighting. Government departments should take the lead in unifying the interface of lighting equipment, so as to strengthen the compatibility of equipment in the industry, strengthen cooperation between enterprises, and avoid waste of resources.

3. Networking

Based on the current mature communication media, such as CDMA, GPRS, optical fiber communication, PLC and field bus, the intelligent LED street lamp can realize the function of online control. As the current innovation and development of the Internet of Things technology, it is based on various communication technologies, connects a variety of smart devices, and combines their functions to achieve better use effects. As a new concept that integrates technologies such as networks, sensors, and artificial intelligence, the Internet of Things technology is seen as an opportunity for the third information technology revolution. Based on this technology, the intelligence level of the urban lighting control system can be further improved, its long-term stability can be improved, and its use cost can be reduced.